not exactly in the same vein, But I've got a bosch laser tape. It measures distance to within a couple of mm over 50m (about 1/8" over 160'). I use it mainly for building and estimating on building and painting jobs, but it also comes in real handy for measuring tree height. It has come in real handy a few times doing industrial access work when I wasn't sure the ropes would reach. You can use it as a laser pointer also, but I must admit it isn't real bright. Fantastic at night, but a little ordinary or even hard to see in bright light. Fantastic to measure a tree height and then mark out on the ground exactly where it will lay in close quarters falling which is most of my work.
Shaun